The Springfield Armory Saint M-LOK B5 is a 5.56 NATO semi-automatic rifle built on the AR-15 platform and compatible with .223 Remington ammunition. Its 16-inch chrome moly vanadium barrel features a 1:8 right-hand twist for reliable performance with a broad range of bullet weights. The rifle combines a B5 collapsible stock with a B5 M-LOK handguard for adjustable fit and flexible accessory mounting. Standard A2 front and flip-up dual-aperture rear sights provide a practical aiming system, while the optics-ready receiver supports the addition of a compatible sighting optic. The rifle includes one 30-round Magpul PMAG.

Key features

• 16-inch chrome moly vanadium barrel with a 1:8 right-hand twist
• Chambered for 5.56 NATO and compatible with .223 Remington ammunition
• B5 collapsible stock helps accommodate different shooters and storage conditions
• B5 M-LOK handguard provides flexible mounting space for compatible accessories
• A2 front sight and low-profile flip-up dual-aperture rear sight offer dependable backup aiming
• 30+1 capacity with one included 30-round Magpul PMAG

The Springfield Armory Saint M-LOK B5 delivers a versatile, configurable rifle platform for range use, training, and lawful recreational shooting.